So, I recently got an older American Classic 1377 (it has the sliding breech cover) and it won't hold air when I pump. I can't seem to figure out what I need to do in terms of replacement parts in order to get this old lady back up and running. Any thoughts? Thanks in advance!

Robert from USA:

First thing is strip it down and inspect all the seals and springs, and inspect all over the inside of the pumping tube for wear or damage. Replace parts as necessary, starting with o rings or seals. And of course don't forget the pellgun oil.

Tony from USA asked:

what is the dimensions of the Crosman short breech?

Robert from USA asked:

What is the length of the long breech vs the short

frank from USA asked:

Does this breech have a dovetail rail or is it just tapped and ready for a rail to be mounted?

Tyler from USA:

Yes, the dovetail is machined in

65BAJA from USA asked:

Does installing this yourself void a new pistol warranty?

Tyler from USA:

You would have to check with Crosman, but I would imagine so.

philip from USA asked:

Will this work on the original 1377 that has a sleeve over the bolt instead of the handle and knob bolt?

robert from USA:

No it will not.

richard from USA asked:

how long is this breech and what color is it, is every piece black?

robert from USA:

6 1/4 " All parts are Black.

jo from Canada asked:

will this breech fit on the new model on the 1377?? the ''p1377''

Mark from USA:

yes

karl from USA asked:

Can this breech be used for a 2240 177 conversion?

Robert from USA:

Can be used to convert 2240 to 1740 with the addition of .177 barrel, bolt, and probe o-ring.

baxter35 from USA:

Yes, Fits 1377, ***1740*** 1760 a 1740 is a 2240 w/.177 barrel

Dan the Man from USA:

No, since the barrel will still be .22 cal.

Keith from USA asked:

What size dovetail does this breech have?

Elizabeth from USA:

3/8

Rob from USA asked:

hi, is this compatible with the older pull-cock version? I got mine in 1995
thanks

Tyler from USA:

You would need to call Crosman and ask them. Their number is 1-800-7AIRGUN.

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